The features of a shakepearean sonnet are:
They have 14 lines
3 quatrains and a couplet
It consists of three quatrains that are each 4 lines and ends the poem with a two line couplet. It's always going to have a rhyme scheme of abab cdcd efef gg and an iambic pentameter rhythm.
quatrain one - states the problem
quatrain two- elaborates on the problem
quatrain three- a solution
couplet- what happened at the end.